that depends. in a very weird circumstance where you get assigned a prompt that exactly fits a WIP then i say - let your conscience be your guide! but - if you get assigned, like, 'avon/vila go on holiday to the alps' and you twist a blake/servalan story to sort of fit by mentioning in the background that avon and vila have gone on holiday, which is why they aren't around, then i say - no. surely you dont know what the prompts are yet, so it's all hypothetical anyway.